Abstract: An injection blow tool for synthetic plastic injection casting machine has a casting matrix with a plurality of casting molds, an associated matrix movable relative to the casting matrix and provided with mold cores corresponding to the casting molds, the matrix with the mold cores being formed as a turning body, a support supporting the turning body turnable about a turning angle of at least 90.degree. relative to the casting matrix, the support being arranged between the casting matrix and a displaceable blow matrix so that mold cores arranged at a side of the turning body are inserted in the casting molds of the casting matrix and mold cores arranged at the opposite side of the turning body are simultaneously inserted in the blowing molds of the blowing matrix, and simultaneously an injection casting process step and a blowing process step are performed.